Collective escape floating device for underwater escape

Abstract

The invention discloses a collective escape floating device for underwater escape, and belongs to the technical field of underwater lifesaving equipment. The collective escape floating device comprises a barrel serving as a personnel containing cavity, sealable pressure-bearing doors arranged at the upper end and the lower end of the barrel, a locking mechanism used for locking the pressure-bearing doors, a buoyancy piece used for providing floating power for the device, a seat used for fixing personnel and a jacking device used for providing initial escape ejection force. Rapid separation from fault underwater equipment is achieved through the jacking device, and the underwater equipment floats to the water surface through the buoyancy piece, so that collective escape of multiple persons is completed. According to the invention, the pressure-bearing door is locked by adopting outward-opening tooth engagement, so that the sealing is reliable; the buoyancy piece provides stable floating power; the jacking device ensures rapid initial separation; and a multi-person seat and an environment maintenance system are arranged in the cylinder body, so that the escape device has the advantages of high escape efficiency, good safety, convenience in operation and the like.

Description

Technical Field

[0001] This invention relates to the field of underwater rescue equipment technology, specifically to a collective escape floating device suitable for underwater equipment (such as submarines, underwater workstations, etc.), used to quickly and safely transfer multiple people from dangerous underwater environments to the surface. Background Technology

[0002] During missions, underwater equipment may become dangerous due to malfunctions, accidents, or other unforeseen circumstances. In such situations, a reliable escape route must be provided for personnel inside the equipment. Among existing underwater escape equipment, single-person escape devices are widely used, but they suffer from low escape efficiency and difficulty in facilitating coordinated escape for multiple personnel. Meanwhile, the few existing collective escape devices have numerous shortcomings. First, the pressure-bearing sealing structure is not reliable enough, and problems such as water leakage and locking failure are prone to occur in the high-pressure underwater environment, threatening personnel safety.

[0003] Second, the upward buoyancy design is unreasonable, relying heavily on a single buoyancy mechanism, resulting in slow upward speed and difficulty in quickly escaping dangerous areas.

[0004] Third, if the initial ejection mechanism is missing or lacks sufficient power, the device will have difficulty separating quickly from the malfunctioning underwater equipment and will be susceptible to secondary risks such as equipment sinking or capsizing.

[0005] Fourth, the door's opening method and locking structure are poorly designed, making operation difficult in underwater high-pressure environments and preventing the rapid entry and exit of personnel and sealing.

[0006] Therefore, there is an urgent need for an underwater collective escape floating device that is structurally reliable, easy to operate, capable of enabling multiple people to escape together, highly efficient in buoyancy, and with sufficient initial escape power, in order to overcome the shortcomings of existing technologies. Summary of the Invention

[0007] To address the aforementioned problems, the present invention aims to provide a collective evacuation floating device that is structurally reliable, easy to operate, allows for rapid ascent, and enables multiple people to escape simultaneously.

[0008] The objective of this invention is achieved through the following technical solution: A collective escape flotation device for underwater escape includes a cylindrical body serving as a personnel cavity, sealable pressure-bearing doors located at the upper and lower ends of the cylindrical body, a locking mechanism for locking the pressure-bearing doors, a buoyancy component providing upward buoyancy for the device, seats for securing personnel, and a lifting device providing initial ejection force. The lifting device enables rapid separation from malfunctioning underwater equipment, and the device subsequently rises to the surface using the buoyancy of the buoyancy component, thus completing the collective escape.

[0009] Preferably, the cylinder is cylindrical, with end caps fixed at its upper and lower ends (usually by welding). The end caps include an upper end cap fixed at the upper end of the cylinder and a lower end cap fixed at the lower end of the cylinder, with two pressure-bearing doors respectively installed at pre-set circular openings on the upper and lower end caps.

[0010] Preferably, the upper end cap is provided with lifting lugs for hoisting and recovering the device after it floats up, and the lower end cap is provided with a fixing seat for connecting with the lifting device.

[0011] Preferably, the toothed locking mechanism is connected to a hydraulic drive system located inside the cylinder, which is used to drive the locking tooth ring and the meshing tooth groove to engage and disengage underwater.

[0012] Preferably, the pressure-bearing door has an outward-opening circular structure. The locking mechanism is a toothed locking mechanism, including a locking toothed ring on the door body and a meshing toothed groove inside the door frame. The locking toothed ring and the meshing toothed groove mesh with each other to achieve locking. The outward-opening design allows underwater external pressure to help press the door body together, enhancing the sealing effect.

[0013] Preferably, the buoyancy component is a polymer foam buoyancy material, which is fixed to the outside of the upper half of the cylinder to provide continuous and stable net buoyancy for the device.

[0014] Preferably, the lifting device is connected to a fixed base at the lower end of the cylinder via a connecting mechanism. The connecting mechanism is an electromagnetic separation mechanism or a similar quick-release mechanism that can automatically detach after the lifting device completes its ejection action.

[0015] Preferably, the lifting device is a spring-type or hydraulic lifting mechanism, with a square base plate at its bottom, which is used to securely install and fix the entire lifting device in a preset position on the underwater equipment using bolts or other fasteners.

[0016] Preferably, it also includes a pressure equalization system. The pressure equalization system includes a water inlet valve and connecting pipes on the cylinder, used to controllably introduce water into the cylinder before opening the pressure door located at the bottom (when personnel enter) to balance the pressure inside and outside the cylinder, thereby eliminating the pressure difference that hinders the door opening operation.

[0017] Preferably, it also includes at least one or both of a drainage system for draining internal water and a ventilation system for internal air circulation to ensure the safety and comfort of the cabin environment.

[0018] Preferably, the cylinder is provided with a reinforcing structure (such as a reinforcing rib or a reinforcing ring) arranged circumferentially or axially to meet the pressure-bearing strength requirements of the device in a deep-water, high-pressure environment.

[0019] Preferably, eight seats are fixedly installed inside the cylindrical body. The eight seats are evenly distributed along the circumference of the cylindrical body and are secured by seat belts after the person sits down.

[0020] The working process of this invention is briefly described as follows: When underwater equipment malfunctions, personnel first equalize the pressure using the pressure equalization system, open the outward-opening pressure door located on the lower head, enter the cylindrical cavity, sit in the seat, and fasten their safety belts. The lower pressure door is then closed and locked. The operator activates the lifting device, which releases a powerful axial ejection force, rapidly launching the entire floating device away from the malfunctioning equipment. After ejection, the connecting mechanism automatically disengages. The device then begins to rise rapidly under the influence of external buoyancy material fixed to its upper part. During ascent, the drainage system operates to remove any water that may have entered. Once the device surfaces, it can be lifted and recovered using the lifting lugs on the upper head. Personnel can then leave through the upper pressure door, which opens after pressure equalization, or await rescue.

[0021] The beneficial effects of this invention are as follows: (1) High efficiency of collective escape: It can carry 8 people at the same time, which significantly improves the efficiency of escape and greatly enhances the efficiency of underwater escape, solving the problem of low efficiency of single-person escape devices.

[0022] (2) Sealing safety and reliability: The outward-opening toothed pressure door is adopted. Under the high pressure environment underwater, the water pressure can assist the door body to seal. The toothed locking mechanism ensures that the door is firmly locked. Combined with the stable driving force of the internal hydraulic system, it further avoids the risk of water leakage and unlocking failure, and improves the safety of escaping danger.

[0023] (3) Efficient and stable buoyancy: The buoyancy material is set on the outside of the upper part of the cylinder, which can provide sufficient and stable buoyancy for the device. At the same time, the drainage system can drain the water inside the device in time, avoid the extra weight affecting the buoyancy speed, ensure that the device can quickly get away from the underwater danger area, and reduce the underwater stay time.

[0024] (4) Smooth initial separation: The lifting device provides a strong initial ejection force, which can quickly separate the main body of the device from the underwater faulty equipment, avoiding the personnel being affected by the secondary equipment failure again. At the same time, the square base plate ensures that the lifting device is installed firmly and the ejection force is transmitted accurately.

[0025] (5) Easy to operate: The pressure equalization system eliminates the obstruction of the door operation by the pressure difference. Combined with the outward opening pressure door design, the operation is simple and suitable for the underwater high pressure environment. The evenly distributed lifting lugs on the upper end head facilitate the dragging and recovery of the device after it floats up, improving the convenience of rescue.

[0026] (6) In-cabin environment protection: The ventilation and drainage systems ensure that the air inside the cabin is fresh and the environment is dry during the evacuation process, improve the breathing gas requirements of people in the confined space, provide a good waiting environment for rescuers, and further enhance the comfort and safety of people during the evacuation process.

[0027] (7) Robust and durable structure: The reinforced structure enables the cylinder to withstand deep water pressure, resulting in high overall reliability. Attached Figure Description

[0028] Figure 1 This is an axonometric view of the overall structure of the collective escape and floating device described in this invention.

[0029] Figure 2 This is a front view of the collective escape and floating device described in this invention.

[0030] Figure 3 This is a side view of the collective escape and floating device described in this invention.

[0031] Figure 4 This is a cross-sectional structural diagram of the collective escape and floating device described in this invention.

[0032] Figure 5 This is an overall structural diagram of the collective escape and floating device described in this invention after the external buoyancy material has been removed.

[0033] The figure shows: 1-Columnar cylinder, 2-Upper end cap, 3-Lower end cap, 4-Pressure-bearing door, 5-Gear-type locking mechanism, 6-Buoyancy component, 7-Lifting lug, 8-Fixed seat, 9-Connecting mechanism, 10-Lifting device, 11-Base plate, 12-Drainage interface, 13-Seat, 14-Reinforcing structure. Detailed Implementation

[0034] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0036] In the description of this invention, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. It should be noted that the terms "comprising," "including," or any other variations are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Example 1

[0037] like Figures 1 to 4 As shown in the figure, this embodiment provides a collective escape flotation device for underwater escape, the main body of which is a pressure-resistant sealed chamber for accommodating personnel. The pressure-resistant sealed chamber includes a cylinder 1, a pressure-bearing door 4, a locking mechanism 5, a pressure equalization system, a buoyancy component 6, a fixing base 8, a connecting mechanism 9, and a lifting device 10.

[0038] The cylinder 1 serves as the main structure of the collective escape and floating device. It is a hollow cylindrical body in the shape of a column, with end caps fixed at its upper and lower ends (usually by welding) to form a closed space for personnel. The end caps include an upper end cap 2 welded to the upper end of the cylinder 1 and a lower end cap 3 welded to the lower end of the cylinder 1. Both the upper end cap 2 and the lower end cap 3 have circular openings in their centers for installing pressure doors 4.

[0039] Eight seats 13 are evenly fixedly installed circumferentially inside the cylinder 1, accommodating eight people simultaneously. Each seat 13 is equipped with a multi-point safety belt to ensure the safety and stability of personnel during high-speed ejection and ascent.

[0040] To withstand deep water pressure, circumferential and / or axial reinforcing structures 14 (such as reinforcing ribs or reinforcing rings) are provided on the inner or outer wall of the cylinder 1. These structures are welded to the cylinder to form an integral part, which significantly improves the pressure-bearing strength and stability of the entire chamber.

[0041] The pressure-bearing door 4 is an outward-opening circular structure (hinged to the corresponding end cap on the side). The pressure-bearing door 4 includes a circular door frame and a circular door body. The door frame is cylindrical, and its outer diameter precisely matches the circular opening of the corresponding end cap and is fixedly installed at the circular opening. A connecting plate is hinged to the side of the door frame, and an annular support platform is provided inside the door frame. The door body is sealed inside the door frame, and its inner surface contacts the support platform inside the door frame. The top of the door body is connected to the connecting plate and can rotate outward from the door frame along the hinge point with the connecting plate. A sealing ring is provided on the inner surface of the door body that contacts the door frame support platform to ensure an initial seal.

[0042] Each pressure-bearing door 4 is locked by a set of toothed locking mechanisms 5 to achieve reliable sealing and quick opening and closing under high-pressure underwater conditions. The locking mechanism 5 includes a locking toothed ring disposed around the periphery of the pressure-bearing door 4 and engaging toothed grooves disposed at corresponding circular openings on the end caps. The locking toothed ring is rotatably mounted on the outer periphery of the pressure-bearing door 4 and has at least two (preferably four) evenly spaced locking teeth. The engaging toothed grooves are grooves located on the inner wall of the door frame near the door body, with several notches corresponding to the positions of the locking teeth on the side facing the pressure-bearing door 4. Rotating the locking toothed ring aligns the locking teeth with the notches, achieving mechanical unlocking and allowing the pressure-bearing door 4 to open outwards. After the pressure-bearing door 4 is closed and the locking teeth are engaged in the notches, rotating the locking toothed ring disengages the locking teeth from the notches, and the locking teeth engage in the engaging toothed grooves, completing the mechanical locking. This design is particularly advantageous under high-pressure underwater conditions because external water pressure forces the outward-opening door body of the pressure-bearing door 4 to press more tightly against the sealing ring; the higher the water pressure, the stronger the sealing effect.

[0043] The pressure equalization system is used to equalize the water pressure inside and outside the cylinder 1 after the locking mechanism 5 is unlocked, eliminating pressure difference obstacles for the smooth opening of the pressure gate 4 and adapting to the gate operation requirements in underwater high-pressure environments. The pressure equalization system mainly includes a water inlet valve and connecting pipes installed on the cylinder 1 or the lower end cap 3. When it is necessary to enter the floating device from inside the underwater equipment, the water inlet valve can be opened first to allow external water to slowly enter the cylinder 1 until the pressure inside and outside the pressure gate 4 is basically balanced. This process eliminates the suction force caused by the huge pressure difference on the pressure gate 4, allowing the pressure gate 4 to be easily opened or closed, greatly simplifying the operation process and ensuring personnel safety.

[0044] The buoyancy component 6 is made of high-polymer foamed buoyancy material and is fixed to the exterior of the upper half of the cylinder 1. It provides continuous and stable net buoyancy for the collective floating device, which is the main source of upward buoyancy. The high-polymer foamed buoyancy material used in the buoyancy component 6 is lightweight, corrosion-resistant, and provides stable net buoyancy. It is firmly connected to the cylinder 1 by adhesive or bolt fastening. The installation position of the buoyancy component 6 makes the center of gravity of the collective floating device low and the center of buoyancy high in the water, resulting in stable posture during the ascent and preventing it from rolling over.

[0045] Four fixing seats 8 are evenly fixed at the bottom of the lower end cap 3. Each fixing seat 8 is detachably connected to a lifting device 10 through a connecting mechanism 9. The connecting mechanism 9 is preferably an electromagnetic separation mechanism (for example, the electromagnetic separation mechanism can be structured as follows: it includes an upper connecting mechanism and a lower connecting mechanism; the upper end of the upper connecting mechanism is fixedly connected to the fixing seat 8, and the lower end is connected to a permanent magnet; the lower connecting mechanism includes an independent power supply and controller installed in the underwater equipment, a hollow shell installed in the lifting device 10, an electromagnetic coil installed in the shell, and a coil core sleeved in the electromagnetic coil; when the electromagnetic coil is energized, the controller energizes the electromagnetic coil, the coil generates a magnetic field, and the coil core strongly attracts the permanent magnet of the upper connecting mechanism, realizing the connection between the fixing seat 8 and the lifting device 10; when release is required, the controller cuts off the current to the electromagnetic coil, the magnetic field disappears instantly, the attraction between the permanent magnet and the coil core drops sharply to almost zero, and under the action of the ejection force of the lifting device 10 or the buoyancy of the device itself, the connecting mechanism 9 automatically disengages, and the device is released). The lifting device 10 can employ a long-stroke spring accumulator or a hydraulic ejection cylinder to provide a powerful initial ejection force. The bottom of the lifting device 10 is fixed to a square base plate 11, which is pre-securely installed with bolts at the designated escape hatch location on the underwater equipment. In the event of an emergency, the lifting device 10 is activated, releasing the stored ejection force to propel the entire floating device body axially at high speed, instantly detaching it from any potentially sinking or unstable underwater equipment. Simultaneously with the completion of the ejection action of the lifting device 10, the connecting mechanism 9 is automatically de-energized and released, achieving complete separation of the device body from the base of the lifting device 10.

[0046] In addition, the collective floating device also integrates the following environmental maintenance systems: Drainage system: Equipped with drainage interface 12, which can be connected to an internal or external condensate pump. During the ascent of the collective flotation device or after reaching the water surface, the system can be activated to quickly and thoroughly drain any water that may have seeped into the cabin or been brought in by personnel, keeping the interior dry and reducing unnecessary weight.

[0047] Ventilation system: The collective flotation device is equipped with air circulation and replenishment facilities (such as small fans, ventilation pipelines, high-pressure gas cylinders and high-pressure gas cylinder interfaces), which can be activated after the hatch is closed to continuously provide fresh air to the cabin and circulate the gas, prevent carbon dioxide accumulation and hypoxia, and ensure the breathing safety of personnel while waiting to float and during rescue. The workflow is as follows:

[0048] S1. Personnel Entry and Sealing After underwater equipment encounters distress, the evacuated personnel gather at the hatch of the collective flotation device. First, the operators balance the water pressure inside and outside the collective flotation device using the pressure equalization system. Then, the outward-opening pressure door 4 located on the lower head 3 is opened, and personnel quickly enter the cylinder 1 one by one, sit in the designated seats 13, and fasten their seat belts. After all personnel are in position, the lower pressure door 4 is closed from the inside, and the toothed locking mechanism 5 on the pressure door 4 is rotated to fully engage and lock, achieving a high-pressure seal. Subsequently, the ventilation system can be activated to ensure fresh air inside the chamber.

[0049] S2. Initial ejection disengagement After the hatch seal is confirmed to be secure, the operator (either inside or outside) triggers the start signal of the lifting device 10. The lifting device 10 (e.g., a pre-compressed spring assembly is released instantaneously) generates a huge axial upward thrust, which acts on the entire floating device through the connecting mechanism 9 and the fixing seat 8. The main body of the collective floating device (including the cylinder 1, the end cap, and the personnel inside) is ejected vertically at high speed, quickly detaching from the malfunctioning underwater equipment. At the moment the ejection action is completed, the connecting mechanism 9 (e.g., an electromagnetic lock) automatically separates, and the main body of the collective floating device is completely detached from the lifting device 10 and the bottom plate 11 fixed to the original underwater equipment.

[0050] S3. Floating and Discharge After detachment, the collective flotation device begins to accelerate upwards under the net buoyancy provided by the buoyancy component 6 fixed to its upper part. During the ascent, the drainage system can be activated to drain any small amount of water that may be present in the chamber, further reducing weight and accelerating the ascent speed. The reinforcing structure 14 ensures that the cylinder can withstand water pressure changes during rapid ascent.

[0051] S3. Escape from the water Once the device surfaces, it becomes a prominent rescue target. If the personnel are in good condition and external conditions permit, another pressure equalization system can be operated first (this system mainly includes an air intake valve and connecting pipes located on the upper head 2; this is usually done by balancing the gas pressure inside the chamber with the external atmospheric pressure, or by directly venting). Then, the pressure door 4 of the upper head 2 can be opened from the inside, allowing personnel to evacuate safely. If waiting is required, the ventilation system inside the chamber can continuously ensure a safe living environment. Example 2

[0052] The difference between this embodiment and Embodiment 1 is that, to further ensure the reliability of unlocking, the locking mechanism 5 also integrates a hydraulic drive system. The hydraulic drive system includes a central shaft, at least two connecting rods, a drive arm, and a hydraulic telescopic rod. The central shaft is coaxially fixed to the center of the pressure door 4, with both ends extending inside and outside the pressure door 4. A handle or turntable can be connected to the outer end of the central shaft on the pressure door 4 to facilitate manual opening of the pressure door 4 from the outside. One end of the connecting rod is fixedly connected to the inner end of the central shaft on the pressure door 4, and the other end is connected to the locking gear ring. The central shaft is located... A handle or turntable can also be connected to one end of the inner side of the pressure door 4 to facilitate manual opening of the pressure door 4 from the inside; the drive arm is fixed; one end of the hydraulic rod is hinged to the inner side of the pressure door 4, and the other end is hinged to the drive arm. The hydraulic telescopic rod provides stable hydraulic power for the unlocking action of the locking device, avoiding manual unlocking difficulties caused by high pressure or impurities; the extension and retraction of the extension end of the hydraulic telescopic rod drives the drive arm to swing back and forth, thereby driving the central shaft to rotate axially, and finally driving the locking gear ring to rotate and disengage from the groove through the connecting rod, so that its locking teeth are aligned with the notch, thereby achieving unlocking. Example 3

[0053] The difference between this embodiment and Embodiment 1 or Embodiment 2 is that: Four lifting lugs 7 are evenly distributed along the circumference of the upper head 2 for dragging and retrieval of the collective floating device after it floats to the surface. The lifting lugs 7 are evenly distributed along the circumference of the upper head 2. Rescue personnel can easily lift the entire collective floating device onto the rescue vessel using the lifting lugs 7.

[0054] It should be noted that the terms “comprising,” “including,” or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0055] The scope of protection of this invention is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this invention shall fall within the scope of protection of this invention.

Claims

1. A collective escape flotation device for underwater escape, characterized in that: The device includes a cylindrical body (1) serving as a personnel cavity, a sealable pressure-bearing door (4) located at the upper and lower ends of the cylindrical body (1), a locking mechanism (5) for locking the pressure-bearing door (4), a buoyancy component (6) providing upward floating force for the device, a seat (13) for securing personnel, and a lifting device (10) providing initial ejection force. The lifting device (10) enables rapid separation from the faulty underwater equipment, and the device floats to the surface by relying on the buoyancy component, thereby completing the collective escape.

2. The collective escape flotation device for underwater escape according to claim 1, characterized in that: The cylinder (1) is columnar, with end caps fixed at its upper and lower ends respectively. The end caps include an upper end cap (2) fixed at the upper end of the cylinder (1) and a lower end cap (3) fixed at the lower end of the cylinder (1). Two pressure-bearing doors (4) are respectively installed at the pre-set openings on the upper end cap (2) and the lower end cap (3).

3. The collective escape flotation device for underwater escape according to claim 2, characterized in that: The upper end cap (2) is provided with a lifting lug (7) for hoisting, and the lower end cap (3) is provided with a fixing seat (8) for connecting with the lifting device (10).

4. The collective escape flotation device for underwater escape according to claim 2, characterized in that: The pressure-bearing door (4) is an outward-opening structure. The locking mechanism (5) is a toothed locking mechanism, including a locking tooth ring on the door body of the pressure-bearing door (4) and a meshing tooth groove in the door frame of the pressure-bearing door (4). The locking tooth ring and the meshing tooth groove mesh with each other to achieve locking.

5. The collective escape flotation device for underwater escape according to claim 1, characterized in that: The buoyancy component (6) is a polymer foamed buoyancy material and is fixed to the upper half of the cylinder (1).

6. The collective escape flotation device for underwater escape according to claim 1, characterized in that: The lifting device (10) is connected to the lower end of the cylinder (1) through a connecting mechanism (9). The connecting mechanism (9) is an electromagnetic separation mechanism that can automatically detach after the lifting device (10) completes the ejection action.

7. The collective escape flotation device for underwater escape according to claim 1, characterized in that: The lifting device (10) is a spring-type or hydraulic lifting mechanism, and its bottom is provided with a base plate (11) for fixing to underwater equipment.

8. The collective escape flotation device for underwater escape according to claim 1, characterized in that: It also includes a pressure equalization system; the pressure equalization system includes a water inlet valve and a connecting pipeline installed on the cylinder (1), which is used to balance the internal and external pressure of the cylinder (1) by water inlet when the pressure gate (4) at the lower end of the cylinder (1) needs to be opened.

9. The collective escape flotation device for underwater escape according to claim 1, characterized in that: It also includes one or both of a drainage system for removing internal water and a ventilation system for circulating internal air.

10. The collective escape flotation device for underwater escape according to claim 1, characterized in that: The cylinder (1) is provided with a circumferential or axial reinforcing structure (14).

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